Mr. Trump’s comment comes after the news about North Korea’s hydrogen bomb test, which appears to be small enough to be carried on an intercontinental ballistic missile (ICBM).

Responding to Pyongyang’s announcement, President Trump wrote on Twitter that “their words and actions continue to be very hostile and dangerous to the United States.”

“The United States is considering, in addition to other options, stopping all trade with any country doing business with North Korea,” tweeted Trump.

Despite the US and United Nations Security Council efforts to keep North Korea in check by imposing more sanctions, Pyongyang flew a missile over Japan last week to show that it will not be intimidated.

Trump wrote on Twitter after the demonstration: “The U.S. has been talking to North Korea, and paying them extortion money, for 25 years. Talking is not the answer!”